/Engine/Plugins/Interchange/Runtime/Source/Pipelines/Public/InterchangePipelineMeshesUtilities.h
Return a list of skinnedFInterchangeMeshInstanceuid that can be combined together. We cannot create a skinned mesh with multiple skeleton root node, This function return combined MeshInstance per skeleton roots
void GetCombinedSkinnedMeshInstances ( [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) >> & OutMeshInstanceUidsPerSkeletonRootUid ) const